C # Baidu API speech recognition

         Public Static stringGetstraccess (stringPara_api_key,stringPara_api_secret_key) {            //method Parameter Description://Para_api_key:api_key (your key)//Para_api_secret_key (your secrret_key)//method return Value Description://Baidu authentication Password code, Access_token            stringaccess_html =NULL; stringAccess_token =NULL; stringGetaccessurl ="https://openapi.baidu.com/oauth/2.0/token?grant_type=client_credentials"+"&client_id="+ Para_api_key +"&client_secret="+Para_api_secret_key; Try{HttpWebRequest Getaccessrequest= WebRequest.Create (Getaccessurl) asHttpWebRequest; //getaccessrequest.proxy = null;Getaccessrequest.contenttype ="Multipart/form-data"; Getaccessrequest.accept="*/*"; Getaccessrequest.useragent="mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1;. NET CLR 2.0.50727)"; Getaccessrequest.timeout=30000;//30 seconds If the connection is unsuccessfulGetaccessrequest.method ="Post"; HttpWebResponse Response= Getaccessrequest.getresponse () asHttpWebResponse; using(StreamReader Strhttpcomback =NewStreamReader (response. GetResponseStream (), Encoding.UTF8)) {access_html=Strhttpcomback.readtoend (); }            }            Catch(WebException ex) {Console.Write (ex).                Message);            Console.ReadLine (); } jobject Jo=Jobject.parse (access_html); Access_token= jo["Access_token"]. ToString ();//get back the Toke            returnAccess_token; }         Public Static stringGetstrtext (stringPARA_API_ID,stringPara_api_access_token,stringPara_api_language,stringPara_api_record,stringPara_format,stringpara_hz) {            stringStrjson =""; //method Parameter Description://the method returns a value://The method performs the correct return value is the text of the speech translation, error is the error number, you can go to see the Baidu voice document, see the corresponding error            stringStrText =NULL; stringError =NULL; FileInfo fi=NewFileInfo (Para_api_record); FileStream FS=NewFileStream (Para_api_record, FileMode.Open); byte[] Voice =New byte[FS.            Length]; Fs. Read (voice,0, Voice.            Length); Fs.            Close (); stringGettexturl ="http://vop.baidu.com/server_api?lan="+ Para_api_language +"&cuid="+ para_api_id +"&token="+Para_api_access_token; HttpWebRequest Gettextrequst= WebRequest.Create (Gettexturl) asHttpWebRequest; /*gettextrequst.proxy = null;             GetTextRequst.ServicePoint.Expect100Continue = false;             GetTextRequst.ServicePoint.UseNagleAlgorithm = false;             GetTextRequst.ServicePoint.ConnectionLimit = 65500; Gettextrequst.allowwritestreambuffering = false;*/Gettextrequst.contenttype="Audio/"+ Para_format +"; rate="+para_hz; Gettextrequst.contentlength=fi.            Length; Gettextrequst.method="Post"; Gettextrequst.accept="*/*"; Gettextrequst.keepalive=true; Gettextrequst.useragent="mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1;. NET CLR 2.0.50727)"; Gettextrequst.timeout=30000;//30 seconds If the connection is unsuccessful            using(Stream Writestream =Gettextrequst.getrequeststream ()) {Writestream.write (voice,0, Voice.            Length); } HttpWebResponse gettextresponse= Gettextrequst.getresponse () asHttpWebResponse; using(StreamReader Strhttptext =NewStreamReader (Gettextresponse.getresponsestream (), Encoding.UTF8)) {Strjson=Strhttptext.readtoend (); } jobject jsons= Jobject.parse (Strjson);//parsing JSON            if(jsons["err_msg"]. value<string> () = ="success.") {StrText= jsons["result"][0].                ToString (); returnStrText; }            Else{Error= jsons["Err_no"]. value<string> () + jsons["err_msg"]. value<string>(); returnerror; }        }  stringAccess = Getstraccess ("VJDS2SNHUUDLZ57KTYTQDAVJ","896348e496b47382d49e0cd2e7d5f1e8");            Console.Write (access);            Console.ReadLine (); stringText = Getstrtext ("d0-27-88-67-21-4b", Access,"ZH","1.wav","wav","8000");

Note: The video sampling rate only supports 8000,16000

C # Baidu API speech recognition